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https://issues.apache.org/jira/browse/HADOOP-1999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12533578
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Christian Kunz commented on HADOOP-1999:
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Konstantin, I got he jstack much later after the -finalizeUpgrade, and the
datanode was declared a dead node by the nameserver a long time before.
But the issue might be fixed by HADOOP-1946.
> DataNodes can become dead nodes when running 'dfsadmin finalizeUpgrade'
> -----------------------------------------------------------------------
>
> Key: HADOOP-1999
> URL: https://issues.apache.org/jira/browse/HADOOP-1999
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.15.0
> Environment: Sep 14 nightly build
> Reporter: Christian Kunz
> Priority: Critical
> Attachments: jstack.datanode
>
>
> I restarted namenode with -upgrade option, started a few scripts running
> hadoop command line utility to upload a few files into dfs, and ran at some
> time
> hadoop dfsadmin -finalizeUpgrade.
> At this time all the dfs clients I started before got stuck during block
> transmission.
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